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Silicon dioxide, also known as silica, is a naturally occurring compound found in sand and quartz. It is manufactured for food use by processes like burning silicon tetrachloride or precipitating from sodium silicate solutions.

Manufacturers use silicon dioxide as an anti-caking agent to prevent powders from clumping. It helps maintain a free-flowing texture in products like spices, powdered mixes, and coffee creamers.

Silicon dioxide is generally recognized as safe (GRAS) by the FDA for use as an anti-caking agent. International bodies like JECFA and EFSA have evaluated it. At typical levels used in food, it is not absorbed by the body and is excreted. Some studies have explored potential effects of very high doses, but these are not relevant to typical dietary intake.